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# Copyright (c) Authors of Clover
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
from concurrent import futures
import time
import os
import sys
import grpc
import subprocess
import psutil
import shutil
import pickle
import logging
import nginx_pb2
import nginx_pb2_grpc
from jinja2 import Template
_ONE_DAY_IN_SECONDS = 60 * 60 * 24
GRPC_PORT = '[::]:50054'
class Controller(nginx_pb2_grpc.ControllerServicer):
def __init__(self, service_type):
logging.basicConfig(filename='nginx.log', level=logging.DEBUG)
self.service_type = service_type
self.out_file = '/etc/nginx/nginx.conf'
self.nginx = 0
if service_type == "proxy":
self.template_file = '/grpc/templates/proxy.template'
self.ModifyProxy(nginx_pb2.ConfigProxy(
server_port='9180', server_name='proxy-access-control',
location_path='/', proxy_path='http://http-lb:9180',
mirror_path='http://snort-ids:80'), "")
if service_type == "server":
self.template_file = '/grpc/templates/server.template'
loc = []
val = {}
val['uri_match'] = "/test"
val['directive'] = "try_files $uri @default1"
val['path'] = "/test"
loc.append(val)
locations = pickle.dumps(loc)
files = pickle.dumps([])
self.ModifyServer(nginx_pb2.ConfigServer(
server_port='9180', server_name='clover-server',
site_root='/var/www/html',
upload_path_config='/upload',
upload_path_test='/upload_test',
locations=locations,
files=files,
site_index='index.html'), "")
if service_type == "lb":
self.template_file = '/grpc/templates/lb.template'
slb_list = pickle.dumps(
['clover-server1:9180', 'clover-server2:9180',
'clover-server3:9180'])
self.ModifyLB(nginx_pb2.ConfigLB(
server_port='9180', server_name='http-lb',
slb_list=slb_list,
slb_group='cloverlb', lb_path='/'), "")
def ModifyProxy(self, r, context):
try:
with open(self.template_file) as f:
tmpl = Template(f.read())
output = tmpl.render(
server_port=r.server_port,
server_name=r.server_name,
location_path=r.location_path,
proxy_path=r.proxy_path,
mirror_path=r.mirror_path
)
with open(self.out_file, "wb") as fh:
fh.write(output)
msg = "Modified nginx config"
self.RestartNginx()
except Exception as e:
logging.debug(e)
msg = "Failed to modify nginx config"
return nginx_pb2.NginxReply(message=msg)
def ModifyServer(self, r, context):
try:
locations = pickle.loads(r.locations)
# Generate nginx config
with open(self.template_file) as f:
tmpl = Template(f.read())
output = tmpl.render(
server_port=r.server_port,
server_name=r.server_name,
site_root=r.site_root,
site_index=r.site_index,
upload_path_config=r.upload_path_config,
upload_path_test=r.upload_path_test,
locations=locations
)
with open(self.out_file, "wb") as fh:
fh.write(output)
# Make dirs for locations
for l in locations:
self.MakeDirs(l['path'])
# Generate upload form for config
template_upload = '/grpc/templates/upload_form.template'
out_file = r.site_root + '/' + r.site_index
with open(template_upload) as f:
tmpl = Template(f.read())
output = tmpl.render(
upload_path=r.upload_path_config
)
with open(out_file, "wb") as fh:
fh.write(output)
# Generate upload form for test
template_upload = '/grpc/templates/upload_form.template'
out_file = r.site_root + '/' + 'upload_test.html'
with open(template_upload) as f:
tmpl = Template(f.read())
output = tmpl.render(
upload_path=r.upload_path_test
)
with open(out_file, "wb") as fh:
fh.write(output)
msg = "Modified nginx config"
self.RestartNginx('custom')
# Move files that have been uploaded
file_ops = pickle.loads(r.files)
self.MoveServerFiles(file_ops)
except Exception as e:
logging.debug(e)
msg = "Failed to modify nginx config"
return nginx_pb2.NginxReply(message=msg)
def ModifyLB(self, r, context):
try:
with open(self.template_file) as f:
tmpl = Template(f.read())
output = tmpl.render(
server_port=r.server_port,
server_name=r.server_name,
slb_list=pickle.loads(r.slb_list),
slb_group=r.slb_group,
lb_path=r.lb_path
)
with open(self.out_file, "wb") as fh:
fh.write(output)
msg = "Modified nginx config"
self.RestartNginx()
except Exception as e:
logging.debug(e)
msg = "Failed to modify nginx config"
return nginx_pb2.NginxReply(message=msg)
def DeleteServerFiles(self, upload_folder):
for f in os.listdir(upload_folder):
file_path = os.path.join(upload_folder, f)
try:
if os.path.isfile(file_path):
os.unlink(file_path)
except Exception as e:
logging.debug(e)
def MoveServerFiles(self, file_ops):
response = 1
try:
for fo in file_ops:
try:
shutil.move(fo['src_file'], fo['dest_file'])
except Exception as e:
logging.debug(e)
response = 0
except Exception as e:
logging.debug(e)
return response
def RestartNginx(self, package='default'):
if package == 'custom':
if self.nginx == 0:
p = subprocess.Popen(["nginx"],
stdout=subprocess.PIPE,
shell=True,
preexec_fn=os.setsid)
else:
for proc in psutil.process_iter():
if proc.name() == "nginx":
proc.kill()
p = subprocess.Popen(["nginx"],
stdout=subprocess.PIPE,
shell=True,
preexec_fn=os.setsid)
self.nginx = p
else:
subprocess.Popen(
["service nginx restart"], shell=True)
def MakeDirs(self, path, prefix='/var/www/html/'):
try:
path = prefix + path.strip('/')
os.makedirs(path)
except Exception as e:
logging.debug(e)
def ProcessAlerts(self, request, context):
try:
msg = "Processed alert"
except Exception as e:
logging.debug(e)
msg = "Failed to process alert"
return nginx_pb2.NginxReply(message=msg)
def serve(service_type):
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
nginx_pb2_grpc.add_ControllerServicer_to_server(
Controller(service_type), server)
server.add_insecure_port(GRPC_PORT)
server.start()
try:
while True:
time.sleep(_ONE_DAY_IN_SECONDS)
except KeyboardInterrupt:
server.stop(0)
if __name__ == '__main__':
serve(sys.argv[1])
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